static cairo_int_status_t
_draw_triangle_fan (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
const cairo_point_t *midpt,
const cairo_point_t *points,
int npoints)
{
int i;
/* Our strategy here is to not even try to build a triangle fan, but to
draw each triangle as if it was an unconnected member of a triangle strip. */
for (i = 1; i < npoints; i++) {
cairo_int_status_t status;
cairo_point_t triangle[3];
triangle[0] = *midpt;
triangle[1] = points[i - 1];
triangle[2] = points[i];
status = _cairo_gl_composite_emit_triangle_as_tristrip (ctx, setup, triangle);
if (unlikely (status))
return status;
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_stroke_shaper_add_triangle (void *closure,
const cairo_point_t triangle[3])
{
struct _tristrip_composite_info *info = closure;
return _cairo_gl_composite_emit_triangle_as_tristrip (info->ctx,
&info->setup,
triangle);
}
static cairo_int_status_t
_draw_simple_quad_path (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
const cairo_path_fixed_t *path)
{
cairo_point_t triangle[3];
cairo_int_status_t status;
const cairo_point_t *points;
points = cairo_path_head (path)->points;
triangle[0] = points[0];
triangle[1] = points[1];
triangle[2] = points[2];
status = _cairo_gl_composite_emit_triangle_as_tristrip (ctx, setup, triangle);
if (status)
return status;
triangle[0] = points[2];
triangle[1] = points[3];
triangle[2] = points[0];
return _cairo_gl_composite_emit_triangle_as_tristrip (ctx, setup, triangle);
}
